Secret levels are a joy to discover and explore, but these 15 games did them best while still maintaining their secrecy for years. This means they gave us something to discover that is actually worth the hassle of uncovering it. And uncovering some of these secrets is certainly a hassle.
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DOOM – Original Doom Games
Hidden in every level of the stellar new DOOM game are nods to the series’ past. These snippets of past DOOM levels are not only fun to explore and difficult to track down but gorgeous to behold. They are recreated with such loving detail that you can’t help but stop and stare at the pixelated beauty.